New details continue to emerge about the early life of 'Jihadi John', the Islamic State (Isis) executioner who has gained notoriety after murdering hostages on camera.

An unnamed former classmate told the Sun that Mohamed Emwazi was an aggressive teenager who "smoked drugs, drank and was violent towards other boys" and was "obsessed with Snoop Dogg, Eminem and Tupac Shakur".

"I never saw him pray or wear Islamic dress – he would not even mention religion at all. Being a Muslim myself, I was very aware of it at the time," she told the paper.

"The fact that he portrays himself as a strict Muslim is laughable and shameful."

Another former classmate at the Quintin Kynaston school in London told the Daily Mirror she was horrified to discover that the shy 16-year-old who was too timid to ask her out grew up to become one of the world's most wanted men.

Ahlam Ajjot, 27, who had maths and english classes with Emwazi, told the Mirror: "I never knew Mohammed liked me and I can't believe it now when I think about him feeling that way."

"He was shy and reserved. He was really quiet and didn't get involved in all the hype and drama of school life," she said.

"He never spoke to girls unless he had to. He was awkward. I was so shocked when I saw the news that he was Jihadi John. I couldn't believe the pictures of him in a balaclava and in Syria. It's not the person I knew from school."

Another former classmate, who wished to remain anonymous, told the Mirror that Emwazi was incredibly shy around the opposite sex, but developed a crush on Ahlam.

"Only eight years ago, he was a painfully shy, nervous guy who wouldn't say boo to a goose. He was bullied and humiliated by girls. To think he has killed so many people is impossible to comprehend."